Method and apparatus for location determination in a wireless assisted hybrid positioning system

A method to determine a position of a mobile device in a positioning system, the method comprising:

• determining an estimated clock bias from a strength indicator of a signal transmitted from a navigational transmitter to the mobile device.

A machine readable media containing executable computer program instructions which when executed by a digital processing system cause said system to perform a method to determine a position of a mobile device in a positioning system, the method comprising:

• computing a second estimated position of a mobile device using a first assumed geometric relationship for a location of the mobile device in relation to a navigational transmitter, the first geometric relationship being linearly independent from an altitude of the mobile device and a second geometric relationship based on range information measured with respect to the navigational transmitter.

A machine readable media containing executable computer program instructions which when executed by a digital processing system cause said system to perform a method to determine a position of a mobile device in a positioning system, the method comprising:

• determining an estimated clock bias from a strength indicator of a signal transmitted from a navigational transmitter to the mobile device.

A digital processing system to determine a position of a mobile device in a positioning system, the processing system comprising:

• means for computing a second estimated position of a mobile device using a first assumed geometric relationship for a location of the mobile device in relation to a navigational transmitter, the first geometric relationship being linearly independent from an altitude of the mobile device and a second geometric relationship based on range information measured with respect to the navigational transmitter.

A digital processing system to determine a position of a mobile device in a positioning system, the processing system comprising:

• means for determining an estimated clock bias from a strength indicator of a signal transmitted from a navigational transmitter to the mobile device.